“Regular exercise may help keep teenagers' blood pressure in check, regardless of their body weight, a new study suggests. Researchers found that among nearly 1,300 Canadian teenagers they followed for five years, declining exercise levels over time were linked to small increases in blood pressure. Gains in body fat were also linked to blood pressure increases, but excess weight did not fully account for the relationship between exercise and blood pressure changes --especially in girls. The implication, the researchers report in the American Journal of Epidemiology, is that both weight and exercise habits independently affect...
http://www.reutershealth.com/archive/2009/11/20/eline/links/20091120elin003.html
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